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annotate graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/SLMain.java @ 19650:ac35617db239
Truffle/Instrumentation: Javadoc fix
author | Michael Van De Vanter <michael.van.de.vanter@oracle.com> |
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date | Sat, 28 Feb 2015 09:32:36 -0800 |
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1 /* |
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2 * Copyright (c) 2012, 2015, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 */ |
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23 package com.oracle.truffle.sl; |
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24 |
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25 import java.io.*; |
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26 import java.math.*; |
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27 import java.util.Scanner; |
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28 |
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29 import com.oracle.truffle.api.*; |
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30 import com.oracle.truffle.api.dsl.*; |
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31 import com.oracle.truffle.api.instrument.*; |
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32 import com.oracle.truffle.api.nodes.*; |
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33 import com.oracle.truffle.api.source.*; |
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34 import com.oracle.truffle.api.tools.*; |
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35 import com.oracle.truffle.sl.builtins.*; |
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36 import com.oracle.truffle.sl.factory.*; |
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37 import com.oracle.truffle.sl.nodes.*; |
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38 import com.oracle.truffle.sl.nodes.call.*; |
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39 import com.oracle.truffle.sl.nodes.controlflow.*; |
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40 import com.oracle.truffle.sl.nodes.expression.*; |
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41 import com.oracle.truffle.sl.nodes.instrument.*; |
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42 import com.oracle.truffle.sl.nodes.local.*; |
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43 import com.oracle.truffle.sl.parser.*; |
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44 import com.oracle.truffle.sl.runtime.*; |
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45 |
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46 /** |
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47 * SL is a simple language to demonstrate and showcase features of Truffle. The implementation is as |
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48 * simple and clean as possible in order to help understanding the ideas and concepts of Truffle. |
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49 * The language has first class functions, but no object model. |
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50 * <p> |
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51 * SL is dynamically typed, i.e., there are no type names specified by the programmer. SL is |
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52 * strongly typed, i.e., there is no automatic conversion between types. If an operation is not |
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53 * available for the types encountered at run time, a type error is reported and execution is |
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54 * stopped. For example, {@code 4 - "2"} results in a type error because subtraction is only defined |
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55 * for numbers. |
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57 * <p> |
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58 * <b>Types:</b> |
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59 * <ul> |
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60 * <li>Number: arbitrary precision integer numbers. The implementation uses the Java primitive type |
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61 * {@code long} to represent numbers that fit into the 64 bit range, and {@link BigInteger} for |
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62 * numbers that exceed the range. Using a primitive type such as {@code long} is crucial for |
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63 * performance. |
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64 * <li>Boolean: implemented as the Java primitive type {@code boolean}. |
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65 * <li>String: implemented as the Java standard type {@link String}. |
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66 * <li>Function: implementation type {@link SLFunction}. |
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67 * <li>Null (with only one value {@code null}): implemented as the singleton |
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68 * {@link SLNull#SINGLETON}. |
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69 * </ul> |
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70 * The class {@link SLTypes} lists these types for the Truffle DSL, i.e., for type-specialized |
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71 * operations that are specified using Truffle DSL annotations. |
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73 * <p> |
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74 * <b>Language concepts:</b> |
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75 * <ul> |
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76 * <li>Literals for {@link SLBigIntegerLiteralNode numbers} , {@link SLStringLiteralNode strings}, |
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77 * and {@link SLFunctionLiteralNode functions}. |
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78 * <li>Basic arithmetic, logical, and comparison operations: {@link SLAddNode +}, {@link SLSubNode |
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79 * -}, {@link SLMulNode *}, {@link SLDivNode /}, {@link SLLogicalAndNode logical and}, |
14906 | 80 * {@link SLLogicalOrNode logical or}, {@link SLEqualNode ==}, !=, {@link SLLessThanNode <}, |
81 * {@link SLLessOrEqualNode ≤}, >, ≥. | |
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82 * <li>Local variables: local variables must be defined (via a {@link SLWriteLocalVariableNode |
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83 * write}) before they can be used (by a {@link SLReadLocalVariableNode read}). Local variables are |
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84 * not visible outside of the block where they were first defined. |
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85 * <li>Basic control flow statements: {@link SLBlockNode blocks}, {@link SLIfNode if}, |
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86 * {@link SLWhileNode while} with {@link SLBreakNode break} and {@link SLContinueNode continue}, |
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87 * {@link SLReturnNode return}. |
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88 * <li>Function calls: {@link SLInvokeNode invocations} are efficiently implemented with |
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89 * {@link SLAbstractDispatchNode polymorphic inline caches}. |
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90 * </ul> |
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92 * <p> |
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93 * <b>Syntax and parsing:</b><br> |
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94 * The syntax is described as an attributed grammar. The {@link Parser} and {@link Scanner} are |
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95 * automatically generated by the parser generator Coco/R (available from <a |
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96 * href="http://ssw.jku.at/coco/">http://ssw.jku.at/coco/</a>). The grammar contains semantic |
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97 * actions that build the AST for a method. To keep these semantic actions short, they are mostly |
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98 * calls to the {@link SLNodeFactory} that performs the actual node creation. All functions found in |
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99 * the SL source are added to the {@link SLFunctionRegistry}, which is accessible from the |
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100 * {@link SLContext}. |
14906 | 101 * |
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102 * <p> |
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103 * <b>Builtin functions:</b><br> |
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104 * Library functions that are available to every SL source without prior definition are called |
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105 * builtin functions. They are added to the {@link SLFunctionRegistry} when the {@link SLContext} is |
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106 * created. There current builtin functions are |
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107 * <ul> |
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108 * <li>{@link SLReadlnBuiltin readln}: Read a String from the {@link SLContext#getInput() standard |
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109 * input}. |
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110 * <li>{@link SLPrintlnBuiltin println}: Write a value to the {@link SLContext#getOutput() standard |
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111 * output}. |
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112 * <li>{@link SLNanoTimeBuiltin nanoTime}: Returns the value of a high-resolution time, in |
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113 * nanoseconds. |
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114 * <li>{@link SLDefineFunctionBuiltin defineFunction}: Parses the functions provided as a String |
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115 * argument and adds them to the function registry. Functions that are already defined are replaced |
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116 * with the new version. |
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117 * </ul> |
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118 * |
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119 * <p> |
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120 * <b>Tools:</b><br> |
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121 * The use of some of Truffle's support for developer tools (based on the Truffle Instrumentation |
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122 * Framework) are demonstrated in this file, for example: |
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123 * <ul> |
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124 * <li>a {@linkplain NodeExecCounter counter for node executions}, tabulated by node type; and</li> |
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125 * <li>a simple {@linkplain CoverageTracker code coverage engine}.</li> |
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126 * </ul> |
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127 * In each case, the tool is enabled if a corresponding local boolean variable in this file is set |
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128 * to {@code true}. Results are printed at the end of the execution using each tool's |
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129 * <em>default printer</em>. |
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130 * |
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131 */ |
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132 public class SLMain { |
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133 |
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134 /* Demonstrate per-type tabulation of node execution counts */ |
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135 private static boolean nodeExecCounts = false; |
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136 /* Demonstrate per-line tabulation of STATEMENT node execution counts */ |
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137 private static boolean statementCounts = false; |
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138 /* Demonstrate per-line tabulation of STATEMENT coverage */ |
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139 private static boolean coverage = false; |
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140 |
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141 /** |
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142 * The main entry point. Use the mx command "mx sl" to run it with the correct class path setup. |
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143 */ |
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144 public static void main(String[] args) throws IOException { |
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145 |
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146 SLContext context = SLContextFactory.create(new BufferedReader(new InputStreamReader(System.in)), System.out); |
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147 |
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148 Source source; |
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149 if (args.length == 0) { |
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150 source = Source.fromReader(new InputStreamReader(System.in), "stdin"); |
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151 } else { |
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152 source = Source.fromFileName(args[0]); |
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153 } |
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154 |
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155 int repeats = 1; |
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156 if (args.length >= 2) { |
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157 repeats = Integer.parseInt(args[1]); |
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158 } |
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159 |
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160 run(context, source, System.out, repeats); |
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161 } |
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162 |
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163 /** |
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164 * Parse and run the specified SL source. Factored out in a separate method so that it can also |
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165 * be used by the unit test harness. |
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166 */ |
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167 public static long run(SLContext context, Source source, PrintStream logOutput, int repeats) { |
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168 if (logOutput != null) { |
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169 logOutput.println("== running on " + Truffle.getRuntime().getName()); |
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170 // logOutput.println("Source = " + source.getCode()); |
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171 } |
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172 |
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173 if (statementCounts || coverage) { |
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174 Probe.registerASTProber(new SLStandardASTProber()); |
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175 } |
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176 |
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177 NodeExecCounter nodeExecCounter = null; |
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178 if (nodeExecCounts) { |
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179 nodeExecCounter = new NodeExecCounter(); |
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180 nodeExecCounter.install(); |
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181 } |
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182 |
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183 NodeExecCounter statementExecCounter = null; |
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184 if (statementCounts) { |
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185 statementExecCounter = new NodeExecCounter(StandardSyntaxTag.STATEMENT); |
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186 statementExecCounter.install(); |
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187 } |
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188 |
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189 CoverageTracker coverageTracker = null; |
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190 if (coverage) { |
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191 coverageTracker = new CoverageTracker(); |
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192 coverageTracker.install(); |
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193 } |
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194 |
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195 /* Parse the SL source file. */ |
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196 Parser.parseSL(context, source); |
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197 |
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198 /* Lookup our main entry point, which is per definition always named "main". */ |
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199 SLFunction main = context.getFunctionRegistry().lookup("main"); |
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200 if (main.getCallTarget() == null) { |
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201 throw new SLException("No function main() defined in SL source file."); |
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202 } |
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203 |
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204 /* Change to true if you want to see the AST on the console. */ |
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205 boolean printASTToLog = false; |
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206 /* Change to true if you want to see source attribution for the AST to the console */ |
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207 boolean printSourceAttributionToLog = false; |
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208 /* Change to dump the AST to IGV over the network. */ |
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209 boolean dumpASTToIGV = false; |
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210 |
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211 printScript("before execution", context, logOutput, printASTToLog, printSourceAttributionToLog, dumpASTToIGV); |
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212 long totalRuntime = 0; |
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213 try { |
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214 for (int i = 0; i < repeats; i++) { |
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215 long start = System.nanoTime(); |
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216 /* Call the main entry point, without any arguments. */ |
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217 try { |
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218 Object result = main.getCallTarget().call(); |
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219 if (result != SLNull.SINGLETON) { |
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220 context.getOutput().println(result); |
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221 } |
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222 } catch (UnsupportedSpecializationException ex) { |
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223 context.getOutput().println(formatTypeError(ex)); |
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224 } |
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225 long end = System.nanoTime(); |
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226 totalRuntime += end - start; |
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227 |
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228 if (logOutput != null && repeats > 1) { |
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229 logOutput.println("== iteration " + (i + 1) + ": " + ((end - start) / 1000000) + " ms"); |
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230 } |
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231 } |
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232 |
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233 } finally { |
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234 printScript("after execution", context, logOutput, printASTToLog, printSourceAttributionToLog, dumpASTToIGV); |
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235 } |
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236 if (nodeExecCounter != null) { |
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237 nodeExecCounter.print(System.out); |
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238 nodeExecCounter.dispose(); |
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239 } |
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240 if (statementExecCounter != null) { |
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241 statementExecCounter.print(System.out); |
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242 statementExecCounter.dispose(); |
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243 } |
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244 if (coverageTracker != null) { |
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245 coverageTracker.print(System.out); |
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246 coverageTracker.dispose(); |
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247 } |
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248 return totalRuntime; |
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249 } |
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250 |
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251 /** |
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252 * When dumpASTToIGV is true: dumps the AST of all functions to the IGV visualizer, via a socket |
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253 * connection. IGV can be started with the mx command "mx igv". |
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254 * <p> |
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255 * When printASTToLog is true: prints the ASTs to the console. |
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256 */ |
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257 private static void printScript(String groupName, SLContext context, PrintStream logOutput, boolean printASTToLog, boolean printSourceAttributionToLog, boolean dumpASTToIGV) { |
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258 if (dumpASTToIGV) { |
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259 GraphPrintVisitor graphPrinter = new GraphPrintVisitor(); |
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260 graphPrinter.beginGroup(groupName); |
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261 for (SLFunction function : context.getFunctionRegistry().getFunctions()) { |
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262 RootCallTarget callTarget = function.getCallTarget(); |
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263 if (callTarget != null) { |
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264 graphPrinter.beginGraph(function.toString()).visit(callTarget.getRootNode()); |
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265 } |
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266 } |
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267 graphPrinter.printToNetwork(true); |
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268 } |
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269 if (printASTToLog && logOutput != null) { |
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270 for (SLFunction function : context.getFunctionRegistry().getFunctions()) { |
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271 RootCallTarget callTarget = function.getCallTarget(); |
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272 if (callTarget != null) { |
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273 logOutput.println("=== " + function); |
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274 NodeUtil.printTree(logOutput, callTarget.getRootNode()); |
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275 } |
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276 } |
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277 } |
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278 if (printSourceAttributionToLog && logOutput != null) { |
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279 for (SLFunction function : context.getFunctionRegistry().getFunctions()) { |
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280 RootCallTarget callTarget = function.getCallTarget(); |
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281 if (callTarget != null) { |
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282 logOutput.println("=== " + function); |
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283 NodeUtil.printSourceAttributionTree(logOutput, callTarget.getRootNode()); |
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284 } |
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285 } |
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286 } |
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287 } |
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288 |
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289 /** |
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290 * Provides a user-readable message for run-time type errors. SL is strongly typed, i.e., there |
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291 * are no automatic type conversions of values. Therefore, Truffle does the type checking for |
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292 * us: if no matching node specialization for the actual values is found, then we have a type |
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293 * error. Specialized nodes use the {@link UnsupportedSpecializationException} to report that no |
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294 * specialization was found. We therefore just have to convert the information encapsulated in |
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295 * this exception in a user-readable form. |
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296 */ |
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297 private static String formatTypeError(UnsupportedSpecializationException ex) { |
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298 StringBuilder result = new StringBuilder(); |
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299 result.append("Type error"); |
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300 if (ex.getNode() != null && ex.getNode().getSourceSection() != null) { |
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301 SourceSection ss = ex.getNode().getSourceSection(); |
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302 if (ss != null && !(ss instanceof NullSourceSection)) { |
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303 result.append(" at ").append(ss.getSource().getName()).append(" line ").append(ss.getStartLine()).append(" col ").append(ss.getStartColumn()); |
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304 } |
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305 } |
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306 result.append(": operation"); |
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307 if (ex.getNode() != null) { |
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308 NodeInfo nodeInfo = SLContext.lookupNodeInfo(ex.getNode().getClass()); |
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309 if (nodeInfo != null) { |
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310 result.append(" \"").append(nodeInfo.shortName()).append("\""); |
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311 } |
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312 } |
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313 result.append(" not defined for"); |
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314 |
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315 String sep = " "; |
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316 for (int i = 0; i < ex.getSuppliedValues().length; i++) { |
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317 Object value = ex.getSuppliedValues()[i]; |
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318 Node node = ex.getSuppliedNodes()[i]; |
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319 if (node != null) { |
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320 result.append(sep); |
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321 sep = ", "; |
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322 |
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323 if (value instanceof Long || value instanceof BigInteger) { |
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324 result.append("Number ").append(value); |
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325 } else if (value instanceof Boolean) { |
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326 result.append("Boolean ").append(value); |
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327 } else if (value instanceof String) { |
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328 result.append("String \"").append(value).append("\""); |
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329 } else if (value instanceof SLFunction) { |
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330 result.append("Function ").append(value); |
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331 } else if (value == SLNull.SINGLETON) { |
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332 result.append("NULL"); |
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333 } else if (value == null) { |
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334 // value is not evaluated because of short circuit evaluation |
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335 result.append("ANY"); |
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336 } else { |
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337 result.append(value); |
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338 } |
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339 } |
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340 } |
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341 return result.toString(); |
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342 } |
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343 |
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344 } |